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1994 Proceedings of IEEE Conference on Computer Vision and Pattern Recognition

21-23 June 1994

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  • Proceedings of IEEE Conference on Computer Vision and Pattern Recognition

    Publication Year: 1994
    Request permission for commercial reuse | PDF file iconPDF (51 KB)
    Freely Available from IEEE
  • Recognizing object function through reasoning about 3-D shape and dynamic physical properties

    Publication Year: 1994, Page(s):546 - 553
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    Recent work in computer vision has demonstrated positive results in reasoning about possible object function based on analysis of only the object shape. While shape properties are important, verification of actual functionality generally requires consideration of properties beyond pure static shape. In particular, dynamic physical properties such as the degree of deformation or rigidity under appl... View full abstract»

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  • Realistic range rendering

    Publication Year: 1994, Page(s):848 - 851
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    In many model-based object recognition systems, a synthesize-and-verify technique is used to evaluate the quality of hypotheses. This technique synthesises images of hypothesized objects in hypothesized poses, and compares them against the input imagery, producing a matching score. In this paper, we examine the image synthesis process in the context of triangulation-based range finding. We motivat... View full abstract»

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  • Projective reconstruction from line correspondences

    Publication Year: 1994, Page(s):903 - 907
    Cited by:  Papers (24)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The paper gives a practical rapid algorithm for doing projective reconstruction of a scene consisting of a set of lines seen in three or more images with uncalibrated cameras. The algorithm is evaluated on real and ideal data to determine its performance in the presence of varying degrees of noise. By carefully consideration of sources of error, it is possible to get accurate reconstruction with r... View full abstract»

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  • Efficient indexing techniques for model based sensing

    Publication Year: 1994, Page(s):259 - 266
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    Indexing is a model-based recognition technique, in which unknown objects are identified using lookup tables. Indexing coordinates are extracted from sensed features, and the indexing coordinates specify a table entry containing the object's identity. Usually, only a small fraction of the possible indexing coordinates correspond to modeled objects, and hash tables are often used to save space. In ... View full abstract»

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  • Overcomplete steerable pyramid filters and rotation invariance

    Publication Year: 1994, Page(s):222 - 228
    Cited by:  Papers (82)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    A given (overcomplete) discrete oriented pyramid may be converted into a steerable pyramid by interpolation. We present a technique for deriving the optimal interpolation functions (otherwise called `steering coefficients'). The proposed scheme is demonstrated on a computationally efficient oriented pyramid, which is a variation on the Burt and Adelson (1983) pyramid. We apply the generated steera... View full abstract»

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  • A shape-from-texture algorithm based on human visual psychophysics

    Publication Year: 1994, Page(s):527 - 532
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    We propose an algorithm for the determination of three dimensional shape and perspective based on the response of the human visual system to changes in visual textures. Current computer vision algorithms are computationally intensive and show inherent difficulties in integrating additional cues for the determination of shape, such as shading, contour, or motion. In order to develop a fast and simp... View full abstract»

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  • Detecting multiple image motions by exploiting temporal coherence of apparent motion

    Publication Year: 1994, Page(s):899 - 902
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Motion-based image segmentation becomes inherently ambiguous when apparent motions of different objects are locally or globally similar during a period. To disambiguate the segmentation, temporal coherence between the local image motion at each edge point and the apparent motion of every object is examined over a long sequence. The point is grouped into that segment of the object whose apparent mo... View full abstract»

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  • Time and space efficient pose clustering

    Publication Year: 1994, Page(s):251 - 258
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (692 KB)

    This paper shows that the pose clustering method of object recognition can be decomposed into small sub-problems without loss of accuracy. Randomization can then be used to limit the number of sub-problems that need to be examined to achieve accurate recognition. These techniques are used to decrease the computational complexity of pose clustering. The clustering step is formulated as an efficient... View full abstract»

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  • A new robust operator for computer vision: theoretical analysis

    Publication Year: 1994, Page(s):1 - 8
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    MINPRAN, a new robust operator, finds good fits in data sets where more than 50% of the points are outliers. Unlike other techniques that handle large outlier percentages, MINPRAN does not rely on a known error bound for the good data. Instead it assumes that the bad data are randomly (uniformly) distributed within the dynamic range of the sensor. Based on this, MINPRAN uses random sampling to sea... View full abstract»

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  • Shape analysis of brain structures using physical and experimental modes

    Publication Year: 1994, Page(s):752 - 755
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    We present a framework for analyzing the shape of structures within the human brain. A mathematical model is developed describing the deformation of any brain structure whose shape is affected by both gross and detailed physical processes. The total shape deformation is decomposed into physical modes of variation obtained from finite element analysis, and experimental modes of variation obtained f... View full abstract»

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  • A survey of motion analysis from moving light displays

    Publication Year: 1994, Page(s):214 - 221
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    Motion-based recognition deals with the recognition of objects or motions directly from the motion information extracted from a sequence of images. There are two main steps in this approach. The first consists of finding an appropriate representation for the objects or motions, from the motion cues of the sequence, and then organize them into useful representations. The second step consists of the... View full abstract»

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  • Surface curvature from integrability

    Publication Year: 1994, Page(s):520 - 526
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    We present a multiple illumination technique that directly recovers the viewer-centered curvature matrix up to a scalar factor, at each mutually illuminated point on a smooth object surface. This technique is completely independent of knowledge of incident illumination orientation, local surface orientation, or diffuse surface albedo. The cornerstone of this technique is the use of the integrabili... View full abstract»

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  • The outlier process: unifying line processes and robust statistics

    Publication Year: 1994, Page(s):15 - 22
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    This paper unifies “line-process” approaches for regularization with discontinuities and robust estimation techniques. We generalize the notion of a “line process” to that of an analog “outlier process” and show that a problem formulated in terms of outlier processes can be viewed in terms of robust statistics. We also characterize a class of robust statistical ... View full abstract»

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  • Good features to track

    Publication Year: 1994, Page(s):593 - 600
    Cited by:  Papers (1120)  |  Patents (111)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (764 KB)

    No feature-based vision system can work unless good features can be identified and tracked from frame to frame. Although tracking itself is by and large a solved problem, selecting features that can be tracked well and correspond to physical points in the world is still hard. We propose a feature selection criterion that is optimal by construction because it is based on how the tracker works, and ... View full abstract»

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  • Practical edge finding with a robust estimator

    Publication Year: 1994, Page(s):649 - 653
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    This paper presents a new algorithm for locating the boundaries of textured regions (both step changes and outliers) using a robust estimator. Previous robust image filters perform poorly on binary images, blur edges, round corners, and run slowly. The author avoids artifacts on binary images by modelling them as continuous and interpolating values. Information is combined directly between non-adj... View full abstract»

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  • Affine-invariant B-spline moments for curve matching

    Publication Year: 1994, Page(s):490 - 495
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    This paper deals with the problem of matching and recognizing planar curves which are modeled as B-splines. The paper presents a fast algorithm for estimating the control points of the B-spline which is robust to nonuniform sampling and noise. Curve matching is achieved by using the similarity measure based on the knot points associated with the B-spline curves. This method, however, can not handl... View full abstract»

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  • Motion estimation and vector splines

    Publication Year: 1994, Page(s):939 - 942
    Cited by:  Papers (36)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Many formulations of visual reconstruction problems (e.g. optic flow, shape from shading, biomedical motion estimation from CT data) involve the recovery of a vector field. Often the solution is characterized via a generalized spline or regularization formulation using a smoothness constraint. This paper introduces a decomposition of the smoothness constraint into two parts: one related to the div... View full abstract»

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  • Affine invariant detection of periodic motion

    Publication Year: 1994, Page(s):970 - 975
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    Current approaches for detecting periodic motion assume a stationary camera and place limits on an object's motion. These approaches rely on the assumption that a periodic motion projects to a set of periodic image curves, an assumption that fails in general. Using affine-invariance, we derive necessary and sufficient conditions for an image sequence to be the projection of a periodic motion. No r... View full abstract»

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  • Error propagation in full 3D-from-2D object recognition

    Publication Year: 1994, Page(s):892 - 898
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Robust recognition systems require a careful understanding of the effects of error in sensed features. Error in these image features results in uncertainty in the possible image location of each additional model feature. We present an accurate, analytic approximation for this uncertainty when model poses are based on matching three image and model points. This result applies to objects that are fu... View full abstract»

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  • Singularity analysis and derivative scale-space

    Publication Year: 1994, Page(s):245 - 250
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The scale-space representations and wavelet transform theory have provided us with good singularity detection frameworks. Thanks to such methods, image understanding processes have become more and more powerful. Some computer vision tasks also require a knowledge on the nature of detected singularities. We propose, in this paper, to take into account these requirements, and we present a singularit... View full abstract»

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  • Vista: a software environment for computer vision research

    Publication Year: 1994, Page(s):768 - 772
    Cited by:  Papers (23)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    Vista is a software environment supporting the modular implementation and execution of computer vision algorithms. Because it is extensible, portable, and freely available, Vista is an appropriate medium for the exchange of standard implementations of algorithms. This paper, an overview of Vista, describes its file format, its data abstraction, its conventions for UNIX filter programs and library ... View full abstract»

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  • Constraint-fusion for interpretation of articulated objects

    Publication Year: 1994, Page(s):39 - 45
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    This paper presents a method for interpretation of modeled objects that is general enough to cover articulated and other types of constrained models. The flexibility between components of the model are expressed as spatial constraints which are fused into the pose estimation during the interpretation process. The constraint fusion assists in obtaining the correct interpretation and in reducing the... View full abstract»

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  • Medium level scene representation using a VLSI smart hexagonal sensor with multiresolution edge extraction capability and scale space integration processing

    Publication Year: 1994, Page(s):632 - 637
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    This paper presents a sensing approach where photo-transduction, multi-resolution feature extraction, scale-space integration and edge tracking are performed on a mixed (digital-analog) VLSI architecture in order to generate medium-level scene description. The proposed system is mainly targeted for robot vision applications where feature description is preferred to a set of raw or raster 2D images... View full abstract»

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  • Closed-form attitude determination under spectrally varying illumination

    Publication Year: 1994, Page(s):985 - 990
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    When a Lambertian surface is illuminated by several chromatic lights the surface normals may be recovered from a single color image. A robust regression is used to find the ellipsoid in color space on which at least half the pixels lie. Then the matrix giving the linear relationship between the color and the surface normal, for non-outlier points is found as a root of the ellipsoid quadratic form.... View full abstract»

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